At one end of my 55gallon tank, I have a filter "Tetratec" which filters 300 gallons per hour. In the center of tank, I have a submersible heater, the temp of the tank is 82 degrees. At the other end of the tank, I have an air pump set on medium for now. I have some ornaments in the tank to provide "hiding" spots and some plastic and silk plants. Is there anything else I need? I plan on keeping about 5 angelfish. I purchased some Aquasafe to treat the tap water with. When I first filled the tank, I added it in. When I do water changes, am I supposed to pour the Aquasafe into the new water before I put it in the tank, or after? Also, I recently noticed a very small scratch on the inside of my aquarium. It's about a half inch long. No leaks, but should I be really concerned about this?
